Re: Does the eRPG SDK template system support JSON? -- WEB400

I wondered the same thing, Henrick.

I haven't done COBOL since the 90s but a search shows this answer from
Bruce Vinning:

http://itknowledgeexchange.techtarget.com/itanswers/calling-rpg-proc-from-cobol-ile/

I guess I just assumed that with ILE things worked as ILE... If CONST ruins
that relationship maybe it should be more "publicized".  :)  I plan too
look further into this issue that's for sure as it's the first I've heard
of it.

Brad
www.bvstools.com

On Mon, May 11, 2015 at 2:03 AM, Henrik Rützou <hr@xxxxxxxxxxxx> wrote:

> I know nothing about COBOL interface to RPG service programs, what is
> the difference (besides the /copybook) ?
>
> On Mon, May 11, 2015 at 5:04 AM, Kelly Cookson <KCookson@xxxxxxxxxxxx>
> wrote:
>
> > Thanks Jon. There are a number of tools for mobile development on the IBM
> > i.
> >
> > However, our shop has decided to develop mobile client interfaces using
> > responsive web sites and hybrid apps (Cordorva/PhoneGap). This is because
> > all of our current mobile developers are coming from a background of
> > Microsoft .NET web development. Our shop has spent years developing
> > websites that connect to the IBM i using web services written in .NET and
> > using the .NET Data Provider.
> >
> > For our IBM i COBOL developers (including myself) to become web and
> mobile
> > developers, we will have to use HTML5, CSS3, JavaScript, AJAX, JSON and
> > Cordova/PhoneGap to develop client interfaces. I was hoping to use
> Node.JS
> > on the IBM i to give our COBOL developers a path to web services without
> > having to learn .NET. Node.JS isn't going to work for us at this time.
> But
> > we can: (a) use our shop's standard technologies to develop web and
> mobile
> > client interfaces, and (b) hook up the client interfaces to web services
> > developed with COBOL CGI programs. This gets our IBM i COBOL developers
> > into web and mobile development without having to learn .NET, and it
> > leverages our existing expertise in COBOL.
> >
> > I have designed an architecture for CGI programming on the IBM i that
> > conforms to REST architectural constraints as described in Fielding's
> > dissertation. I am now gathering information on tools available to help
> us
> > with the COBOL CGI programming. Next step, proof of concepts...
> >
> > Thanks,
> > Kelly
> >
> >
> > -----Original Message-----
> > From: WEB400 [mailto:web400-bounces@xxxxxxxxxxxx] On Behalf Of Jon Paris
> > Sent: Sunday, May 10, 2015 9:36 PM
> > To: Web400@Midrange. Web400
> > Subject: Re: [WEB400] Does the eRPG SDK template system support JSON?
> >
> > For Mobile development with COBOL you should really take a look at
> Lansa's
> > LongRange http://www.longrangemobile.com
> >
> > I know that works pretty well with COBOL because I helped translate a few
> > of the RPG examples into COBOL.
> >
> >
> > Jon Paris
> >
> > www.partner400.com
> > www.SystemiDeveloper.com
> >
> > On May 10, 2015, at 8:00 PM, Kelly Cookson <KCookson@xxxxxxxxxxxx>
> wrote:
> >
> > > I will look for the template system in CGICBLDEV2 when I get it
> > installed and start playing around with it.
> > >
> > > I literally just started looking at CGI tools. I recently learned that
> > > our shop will not be adopting Node.JS on the IBM i at any time in the
> > > foreseeable future. Kind of a bummer. But the same reasons for not
> > > adopting Node.JS make CGI using COBOL programs an attractive
> > > alternative. (Every shop is different, and I'm sure Node.JS will work
> > > wonderfully for a lot of shops. It's just not a good fit for us at
> > > this time.)
> > >
> > > I'm still committed to helping our IBM i COBOL developers become web
> > > and mobile developers as well. ;-)
> > >
> > > Thanks,
> > > Kelly
> > >
> > > -----Original Message-----
> > > From: WEB400 [mailto:web400-bounces@xxxxxxxxxxxx] On Behalf Of Jon
> > > Paris
> > > Sent: Sunday, May 10, 2015 7:30 PM
> > > To: Web400@Midrange. Web400
> > > Subject: Re: [WEB400] Does the eRPG SDK template system support JSON?
> > >
> > > CGICBLDEV2 uses a template system too Kelly.
> > >
> > >
> > > Jon Paris
> > >
> > > www.partner400.com
> > > www.SystemiDeveloper.com
> > >
> > > On May 10, 2015, at 12:55 PM, Kelly Cookson <KCookson@xxxxxxxxxxxx>
> > wrote:
> > >
> > >> Thanks Jon. I am looking at CGICBLDEV2 as well. And I'm looking at
> > other solutions such as the CGI interface to XMLSERVICE and iWebSrv.
> > >>
> > >> The thing I like about eRPG SDK is the use of a template system to
> > format data for return to the client. This seems to me a potentially
> > intuitive way for developers who only do COBOL and DDS to deal with
> > returning JSON data. Still, I am also looking at other options for JSON
> > with COBOL (YAJL, PowerEXT, Redvers COBOL JSPN Interface).
> > >>
> > >> The client interfaces we develop will using jQuery AJAX to make GET
> and
> > POST requests, and they will be expecting data formatted in JSON as the
> > response. By keep the contract between the client and the web service
> > uniform (AJAX GET and POST requests, JSON responses) we can develop
> client
> > interfaces that can easily switch between IBM i back ends and Windows
> back
> > ends. We just need to point the client to a new URL to switch back ends.
> > This is one of the benefits of the uniform interface constraint of
> RESTful
> > architecture.
> > >>
> > >> Thanks,
> > >> Kelly
> > >>
> > >> -----Original Message-----
> > >> From: WEB400 [mailto:web400-bounces@xxxxxxxxxxxx] On Behalf Of Jon
> > >> Paris
> > >> Sent: Sunday, May 10, 2015 10:23 AM
> > >> To: Web400@Midrange. Web400
> > >> Subject: Re: [WEB400] Does the eRPG SDK template system support JSON?
> > >>
> > >> Kelly,
> > >>
> > >> You might want to also look at the COBOL interfaces for CGIDEV2 (
> > http://www.easy400.net/cgicbldev2p/start.pgm).
> > >>
> > >> No disrespect to Brad's eRPG but some RPG-oriented interfaces can be
> > very difficult to use in COBOL. Reason, in part, is that such routines
> tend
> > to take advantage of the facilities offered by prototypes - for example
> the
> > keyword CONST allows you to specify a literal instead of a variable.
> COBOL
> > has no such option and therefore the fields usually need to be passed
> > exactly as specified in the called routine. That usually requires quite a
> > bit more work and makes the examples hard to follow.
> > >>
> > >> Giovanni has already done the grunt work and provided documented
> native
> > COBOL interfaces to CGIDEV2 routines that make it much easier.
> > >>
> > >> Just a thought.  Unless Brad has added a lot of new stuff to eRPG that
> > I am unaware of, I think that the capabilities of CGIDEV2 are a close
> match.
> > >>
> > >>
> > >> Jon Paris
> > >>
> > >> www.partner400.com
> > >> www.SystemiDeveloper.com
> > >>
> > >> On May 10, 2015, at 10:46 AM, Kelly Cookson <KCookson@xxxxxxxxxxxx>
> > wrote:
> > >>
> > >>> Thanks Brad.
> > >>>
> > >>> I assume I wouldn't have any problems implementing this in ILE COBOL.
> > I've seen several tutorial examples of creating JSON in RPG, which is
> made
> > easier by built-in functions (like trim) and by  the new += assignment
> > operator. Unfortunately, RPG is not a standard language in our shop. So
> I'd
> > need to use eRPG SDK in ILE COBOL.
> > >>>
> > >>> Thanks,
> > >>> Kelly
> > >>>
> > >>> -----Original Message-----
> > >>> From: WEB400 [mailto:web400-bounces@xxxxxxxxxxxx] On Behalf Of
> > >>> Bradley Stone
> > >>> Sent: Sunday, May 10, 2015 8:10 AM
> > >>> To: Web Enabling the IBM i (AS/400 and iSeries)
> > >>> Subject: Re: [WEB400] Does the eRPG SDK template system support JSON?
> > >>>
> > >>> Hi, Kelly.
> > >>>
> > >>> The eRPG SDK is a template designed system, so if you create JSON
> > templates the eRPG SDK would work the same as if it was using XML, HTML,
> or
> > pretty much anything else.
> > >>>
> > >>> It doesn't know what type of data you're creating using the
> > >>> templates and replacement variables.  :)
> > >>>
> > >>> Brad
> > >>> www.bvstools.com
> > >>>
> > >>> On Sun, May 10, 2015 at 2:15 AM, Kelly Cookson
> > >>> <KCookson@xxxxxxxxxxxx>
> > >>> wrote:
> > >>>
> > >>>> Suppose I want to develop a CGI program in ILE COBOL using eRPG SDK.
> > >>>>
> > >>>> Can the ILE COBOL program read a DB2 table and use the eRPG SDK
> > >>>> template system to return a JSON string?
> > >>>>
> > >>>> Thanks,
> > >>>>
> > >>>> Kelly Cookson
> > >>>> IT Project Leader
> > >>>> Dot Foods, Inc.
> > >>>> 1.217.773.4486 ext. 12676
> > >>>> kcookson@xxxxxxxxxxxx<mailto:kcookson@xxxxxxxxxxxx>
> > >>>>
> > >>>>
> > >>>> --
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>
> --
> Regards,
> Henrik Rützou
>
>  http://powerEXT.com <http://powerext.com/>
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